A love story and a draw

Hello, I need your help to find a film that I saw years ago in TV but I have only some memories about the story so below infos aren’t 100% accurate, sorry.

Main characters are two teens, a guy, principal, and the girl, with red or blonde hair.
It is set in the modern era

The plot is about the love story between them.
The guy is good to draw pictures and secretly paints her. Only at the end of the movie, she will find the draw, in a room with a white blanket on it.
The guy probably died or left the city for some reasons.

I remember a scene where the two meet in a bar/pub, with a london style, to speak about their love story.

I don’t know if it can help but the actress was very very beautiful, with a young face and a slim body.